Mercurial > octave
view scripts/image/rgb2ind.m @ 29949:f254c302bb9c
remove JIT compiler from Octave sources
As stated in the NEWS file entry added with this changeset, no one
has ever seriously taken on further development of the JIT compiler in
Octave since it was first added as part of a Google Summer of Code
project in 2012 and it still does nothing significant. It is out of
date with the default interpreter that walks the parse tree. Even
though we have fixed the configure script to disable it by default,
people still ask questions about how to build it, but it doesn’t seem
that they are doing that to work on it but because they think it will
make Octave code run faster (it never did, except for some extremely
simple bits of code as examples for demonstration purposes only).
* NEWS: Note change.
* configure.ac, acinclude.m4: Eliminate checks and macros related to
the JIT compiler and LLVM.
* basics.txi, install.txi, octave.texi, vectorize.txi: Remove mention
of JIT compiler and LLVM.
* jit-ir.cc, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.cc,
jit-util.h, pt-jit.cc, pt-jit.h: Delete.
* libinterp/parse-tree/module.mk: Update.
* Array-jit.cc: Delete.
* libinterp/template-inst/module.mk: Update.
* test/jit.tst: Delete.
* test/module.mk: Update.
* interpreter.cc (interpreter::interpreter): Don't check options for
debug_jit or jit_compiler.
* toplev.cc (F__octave_config_info__): Remove JIT compiler and LLVM
info from struct.
* ov-base.h (octave_base_value::grab, octave_base_value::release):
Delete.
* ov-builtin.h, ov-builtin.cc (octave_builtin::to_jit,
octave_builtin::stash_jit): Delete.
(octave_builtin::m_jtype): Delete data member and all uses.
* ov-usr-fcn.h, ov-usr-fcn.cc (octave_user_function::m_jit_info):
Delete data member and all uses.
(octave_user_function::get_info, octave_user_function::stash_info): Delete.
* options.h (DEBUG_JIT_OPTION, JIT_COMPILER_OPTION): Delete macro
definitions and all uses.
* octave.h, octave.cc (cmdline_options::cmdline_options): Don't handle
DEBUG_JIT_OPTION, JIT_COMPILER_OPTION): Delete.
(cmdline_options::debug_jit, cmdline_options::jit_compiler): Delete
functions and all uses.
(cmdline_options::m_debug_jit, cmdline_options::m_jit_compiler): Delete
data members and all uses.
(octave_getopt_options long_opts): Remove "debug-jit" and
"jit-compiler" from the list.
* pt-eval.cc (tree_evaluator::visit_simple_for_command,
tree_evaluator::visit_complex_for_command,
tree_evaluator::visit_while_command,
tree_evaluator::execute_user_function): Eliminate JIT compiler code.
* pt-loop.h, pt-loop.cc (tree_while_command::get_info,
tree_while_command::stash_info, tree_simple_for_command::get_info,
tree_simple_for_command::stash_info): Delete functions and all uses.
(tree_while_command::m_compiled, tree_simple_for_command::m_compiled):
Delete member variable and all uses.
* usage.h (usage_string, octave_print_verbose_usage_and_exit): Remove
[--debug-jit] and [--jit-compiler] from the message.
* Array.h (Array<T>::Array): Remove constructor that was only intended
to be used by the JIT compiler.
(Array<T>::jit_ref_count, Array<T>::jit_slice_data,
Array<T>::jit_dimensions, Array<T>::jit_array_rep): Delete.
* Marray.h (MArray<T>::MArray): Remove constructor that was only
intended to be used by the JIT compiler.
* NDArray.h (NDArray::NDarray): Remove constructor that was only
intended to be used by the JIT compiler.
* dim-vector.h (dim_vector::to_jit): Delete.
(dim_vector::dim_vector): Remove constructor that was only intended to
be used by the JIT compiler.
* codeql-analysis.yaml, make.yaml: Don't require llvm-dev.
* subst-config-vals.in.sh, subst-cross-config-vals.in.sh: Don't
substitute OCTAVE_CONF_LLVM_CPPFLAGS, OCTAVE_CONF_LLVM_LDFLAGS, or
OCTAVE_CONF_LLVM_LIBS.
* Doxyfile.in: Don't define HAVE_LLVM.
* aspell-octave.en.pws: Eliminate jit, JIT, and LLVM from the list of
spelling exceptions.
* build-env.h, build-env.in.cc (LLVM_CPPFLAGS, LLVM_LDFLAGS,
LLVM_LIBS): Delete variables and all uses.
* libinterp/corefcn/module.mk (%canon_reldir%_libcorefcn_la_CPPFLAGS):
Remove $(LLVM_CPPFLAGS) from the list.
* libinterp/parse-tree/module.mk (%canon_reldir%_libparse_tree_la_CPPFLAGS):
Remove $(LLVM_CPPFLAGS) from the list.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 10 Aug 2021 16:42:29 -0400 |
parents | e637c2342433 |
children | 796f54d4ddbf |
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######################################################################## ## ## Copyright (C) 1994-2021 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave is free software: you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {[@var{x}, @var{map}] =} rgb2ind (@var{rgb}) ## @deftypefnx {} {[@var{x}, @var{map}] =} rgb2ind (@var{R}, @var{G}, @var{B}) ## Convert an image in red-green-blue (RGB) color space to an indexed image. ## ## The input image @var{rgb} can be specified as a single matrix of size ## @nospell{MxNx3}, or as three separate variables, @var{R}, @var{G}, and ## @var{B}, its three color channels, red, green, and blue. ## ## It outputs an indexed image @var{x} and a colormap @var{map} to interpret ## an image exactly the same as the input. No dithering or other form of color ## quantization is performed. The output class of the indexed image @var{x} ## can be uint8, uint16 or double, whichever is required to specify the ## number of unique colors in the image (which will be equal to the number ## of rows in @var{map}) in order. ## ## Multi-dimensional indexed images (of size @nospell{MxNx3xK}) are also ## supported, both via a single input (@var{rgb}) or its three color channels ## as separate variables. ## ## @seealso{ind2rgb, rgb2hsv, rgb2gray} ## @end deftypefn ## FIXME: This function has a very different syntax than the Matlab ## one of the same name. ## Octave function does not support N, MAP, DITHER, or TOL arguments. function [x, map] = rgb2ind (R, G, B) if (nargin != 1 && nargin != 3) print_usage (); endif if (nargin == 1) rgb = R; if (ndims (rgb) > 4 || size (rgb, 3) != 3) error ("rgb2ind: argument is not an RGB image"); else R = rgb(:,:,1,:); G = rgb(:,:,2,:); B = rgb(:,:,3,:); endif elseif (! size_equal (R, G, B)) error ("rgb2ind: R, G, and B must have the same size"); endif x = reshape (1:numel (R), size (R)); map = unique ([R(:) G(:) B(:)], "rows"); [~, x] = ismember ([R(:) G(:) B(:)], map, "rows"); x = reshape (x, size (R)); ## a colormap is of class double and values between 0 and 1 switch (class (R)) case {"single", "double", "logical"} ## do nothing, return the same case {"uint8", "uint16"} map = double (map) / double (intmax (R)); case "int16" map = (double (im) + 32768) / 65535; otherwise error ("rgb2ind: unsupported image class %s", im_class); endswitch ## we convert to the smallest class necessary to encode the image. Matlab ## documentation does not mention what it does when uint16 is not enough... ## When an indexed image is of integer class, there's a -1 offset to the ## colormap, hence the adjustment if (rows (map) < 256) x = uint8 (x - 1); elseif (rows (map) < 65536) x = uint16 (x - 1); else ## leave it as double endif endfunction ## Test input validation %!error <Invalid call> rgb2ind () %!error <Invalid call> rgb2ind (1,2) %!error <RGB> rgb2ind (rand (10, 10, 4)) ## FIXME: the following tests simply make sure that rgb2ind and ind2rgb ## reverse each other. We should have better tests for this. ## Typical usage %!test %! rgb = rand (10, 10, 3); %! [ind, map] = rgb2ind (rgb); %! assert (ind2rgb (ind, map), rgb); %! %! ## test specifying the RGB channels separated %! [ind, map] = rgb2ind (rgb(:,:,1), rgb(:,:,2), rgb(:,:,3)); %! assert (ind2rgb (ind, map), rgb); ## Test N-dimensional images %!test %! rgb = rand (10, 10, 3, 10); %! [ind, map] = rgb2ind (rgb); %! assert (ind2rgb (ind, map), rgb); %! [ind, map] = rgb2ind (rgb(:,:,1,:), rgb(:,:,2,:), rgb(:,:,3,:)); %! assert (ind2rgb (ind, map), rgb); ## Test output class %!test %! ## this should have more than 65535 unique colors %! rgb = nchoosek (0:80, 3) / 80; %! nr = rows (rgb); %! assert (nr > 65535); %! rgb = reshape (rgb, [1, nr, 3]); %! [ind, map] = rgb2ind (rgb); %! assert (class (ind), "double"); %! assert (class (map), "double"); %! %! ## and this should have between 256 and 65535 unique colors %! rgb = nchoosek (0:40, 3) / 80; %! nr = rows (rgb); %! assert (nr >= 256 && nr <= 65535); %! rgb = reshape (rgb, [1, nr, 3]); %! [ind, map] = rgb2ind (rgb); %! assert (class (ind), "uint16"); %! assert (class (map), "double"); %! %! ## and this one should have fewer than than 256 unique colors %! rgb = nchoosek (0:10, 3) / 80; %! nr = rows (rgb); %! assert (nr < 256); %! rgb = reshape (rgb, [1, nr, 3]); %! [ind, map] = rgb2ind (rgb); %! assert (class (ind), "uint8"); %! assert (class (map), "double");